Originally Posted by bleme
This is why you aren't supposed to bitter with home grown hops - you can't test the AA%.
Who the F cares. You people need to lighten up on the calculation aspect of bitterness. Calcs over estimate IBUs for 60 min additions (see the Basic Brewing experiments) and they don't even account for whirlpool or flame out IBUs.
In the spirit of a home made product, I think it is exciting NOT knowing what I will get when I make a full home grown hopped beer.
Also, the AA% on a bag is what it was at the farm. Who knows how long the hops sat in a box in a 90 degree UPS truck and lost some AAs. Also, I have seen stores buy in bulk and then dole out 1 oz bags that aren't air barrier bags. Point being, even when the AA is printed on a bag you really don't know the AA% that is going into your boil.